Updates for LOOT's Travis CI integration

* Build and use Boost 1.61.0
* Cache Node, Bower and Boost dependencies
* Always link to static Boost libraries
* Remove Travis's Boost ABI incompatibility hack

.travis.yml

@@ -8,16 +8,10 @@ compiler: gcc
 addons:
   apt:
     sources:
-      - boost-latest
-      - ubuntu-toolchain-r-test
-      - kubuntu-backports
+      - ubuntu-toolchain-r-test # ppa:ubuntu-toolchain-r/test
+      - kubuntu-backports       # ppa:kubuntu-ppa/backports
     packages:
-      - libboost-log1.55-dev
-      - libboost-date-time1.55-dev
-      - libboost-thread1.55-dev
-      - libboost-filesystem1.55-dev
-      - libboost-locale1.55-dev
-      - libboost-iostreams1.55-dev
+      - libbz2-dev
       - libssl-dev
       - gcc-5
       - g++-5
@@ -25,6 +19,13 @@ addons:
       - cmake-data
   sauce_connect: true
 
+cache:
+  directories:
+    - $TRAVIS_BUILD_DIR/node_modules
+    - $TRAVIS_BUILD_DIR/bower_components
+    - $HOME/boost_1_61_0/boost
+    - $HOME/boost_1_61_0/stage/lib
+
 install:
   # Use GCC 5.
   - if [ "$CXX" = "g++" ]; then export CXX="g++-5" CC="gcc-5"; fi
@@ -38,15 +39,18 @@ install:
   - export PATH="./node_modules/.bin:$PATH"
   # Install runtime dependencies using Bower
   - bower install
+  - chmod +x scripts/travis/install_boost.sh
+  - scripts/travis/install_boost.sh
 
 before_script:
   # Move into the cloned LOOT repo build path.
   - mkdir build && cd build
-  # Travis machines are 64 bit, and the dependencies use dynamic linking.
-  - cmake .. -DPROJECT_STATIC_RUNTIME=OFF -DBUILD_SHARED_LIBS=OFF
+  # Link dynamically to the C++ standard library runtime.
+  - cmake .. -DPROJECT_STATIC_RUNTIME=OFF -DBOOST_ROOT=~/boost_1_61_0
 
 script:
   - if [ "${TRAVIS_PULL_REQUEST}" = "false" ]; then npm test; fi
+  - export CXXFLAGS="-fPIC" CFLAGS="-fPIC"
   - make tests && ./tests
   - make api-tests && ./api-tests
 

CMakeLists.txt

@@ -30,7 +30,7 @@ configure_file("${CMAKE_SOURCE_DIR}/src/backend/app/loot_version.cpp.in" "${CMAK
 # External Projects
 ##############################
 
-set (Boost_USE_STATIC_LIBS ${PROJECT_STATIC_RUNTIME})
+set (Boost_USE_STATIC_LIBS ON)
 set (Boost_USE_MULTITHREADED ON)
 set (Boost_USE_STATIC_RUNTIME ${PROJECT_STATIC_RUNTIME})
 
@@ -317,13 +317,6 @@ include_directories ("${CMAKE_SOURCE_DIR}/src"
 # System-Specific Settings
 ##############################
 
-# If building on Travis, define BOOST_NO_CXX11_SCOPED_ENUMS to avoid
-# boost::filesystem::copy_file() linking errors due to mismatched C++ runtimes
-# between Boost and LOOT.
-IF ($ENV{TRAVIS})
-    add_definitions (-DBOOST_NO_CXX11_SCOPED_ENUMS)
-ENDIF ()
-
 # Settings when compiling for Windows.
 IF (CMAKE_SYSTEM_NAME MATCHES "Windows")
     add_definitions (-DUNICODE -D_UNICODE -DLIBLO_STATIC)

docs/BUILD.LINUX.md

@@ -32,14 +32,6 @@ sudo apt-get update
 sudo apt-get install nodejs libx11-dev libgtk2.0-dev libnss3-dev libgconf2-dev libxss-dev libasound2-dev libxtst-dev
 ```
 
-## Pre-built Boost Packages Workaround
-
-The pre-built Boost packages for Boost 1.55 and below in Ubuntu were built without C++11 support, which causes an error when linking with a C++11-built LOOT binary. While it's better to use a build of Boost with C++11 support when building LOOT, the error can be worked around by running the following before running CMake:
-
-```
-export TRAVIS=1
-```
-
 ## Runtime Differences
 
 Not all LOOT's features have been implemented for Linux builds. Issues labelled

scripts/travis/install_boost.sh

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+BOOST_BASENAME=boost_1_61_0
+BOOST_LIBRARIES=(libboost_atomic.a libboost_chrono.a libboost_date_time.a libboost_filesystem.a libboost_iostreams.a libboost_locale.a libboost_log.a libboost_log_setup.a libboost_regex.a libboost_system.a libboost_thread.a)
+
+function isLibraryMissing {
+  for LIBRARY in $BOOST_LIBRARIES; do
+    if [[ ! -e ~/$BOOST_BASENAME/stage/lib/$LIBRARY ]]; then
+      return 0
+    fi
+  done
+
+  return 1
+}
+
+if isLibraryMissing; then
+  cd ~
+
+  wget http://downloads.sourceforge.net/project/boost/boost/1.61.0/${BOOST_BASENAME}.tar.bz2
+  tar xf ${BOOST_BASENAME}.tar.bz2
+
+  cd $BOOST_BASENAME
+  ./bootstrap.sh
+  ./b2 toolset=gcc-5 link=static variant=release address-model=64 cxxflags="-std=c++14 -fPIC" boost.locale.icu=off --with-log --with-date_time --with-thread --with-filesystem --with-locale --with-regex --with-system --with-iostreams
+fi